WEKO3
アイテム
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The central ion temperature has been obtained from Doppler broadening of TiXXI (2.61 angstrom) and ArXVII (3.95 angstrom) x-ray lines measured with a newly installed crystal spectrometer. In ECH discharges on-axis heating was recently done with the appearance of high T_e(0) of 6-10keV and high ion temperature of 2.2keV was observed at n_e=0.6x10^13 cm^-3. A clear increment of T_i was also observed with enhancement of the electron-ion energy flow when the ECH pulse was added to the NBI discharge. These results demonstrate the feasibility toward ECH ignition. The clear T_i increment was also observed in ICRF discharges at low density ranges of 0.4- 0.6 x 10^13 cm^-3 with appearance of a new operational range of T_i(0)=2.8keV\u003eT_e(0)=1.9keV. In the low power ICRF heating (1MW), the fraction of bulk ion heating is estimated to be 60% to the total ICRF input power, which means P_i\u003eP_e. Higher T_i(0) up to 3.5keV was obtained for a combined heating of NBI (\u003c4MW) and ICRF (1MW) at density ranges of 0.5-1.5x10^13 cm^-3. The highest T_i(0) of 5keV was recorded in Ne NBI discharges at n_e \u003c1x10^13 cm^-3 with the achievement of T_i(0)\u003eT_e(0), whereas the T_i(0) remained at relatively low values of 2keV in H_2 or He NBI discharges. The main reasons for the high T_i acievement in the Ne descharge are; 1) 30% increment of deposition power, 2) increase in P_i / n_i (11 times, P_i / n_i \u003e\u003e P_e/n_e, P_i\u003cP_e) and 3) increase in 促tau_ei (3 times). The obtained T_i (0) data can be plotted by a smooth function of P_i / n_i.", "subitem_description_type": "Abstract"}]}, "item_5_source_id_10": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0915-633X", "subitem_source_identifier_type": "ISSN"}]}, "item_5_text_25": {"attribute_name": "登録情報", "attribute_value_mlt": [{"subitem_text_value": "Made available in DSpace on 2010-02-05T10:17:57Z (GMT). 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Study on Ion Temperature Behaviors in Electron and Ion Heating Regimes of ECH, ICRF and NBI Descharges in LHD
http://hdl.handle.net/10655/2735
http://hdl.handle.net/10655/2735ab7d470a-40aa-437e-a76a-c947366b2e08
名前 / ファイル | ライセンス | アクション |
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NIFS-753.pdf (267.7 kB)
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Item type | 研究報告書 / Research Paper(1) | |||||
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公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Study on Ion Temperature Behaviors in Electron and Ion Heating Regimes of ECH, ICRF and NBI Descharges in LHD | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | IAEA | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | fusion energy conference | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Lyon | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
著者 |
Morita, S.
× Morita, S.× Goto, M.× Takeiri, Y.× Miyazawa, J.× Murakami, S.× Narihara, K.× Osakabe, M.× Akiyama, T.× Ashikawa, N.× Emoto, M.× Fujiwara, M.× Funaba, H.× Goncharov, P.× Hamada, Y.× Ida, K.× Idei, H.× Ido, T.× Ikeda, K.× Inagaki, S.× Isobe, M.× Itoh, K.× Kaneko, O.× Kawahata, K.× Kawazome, H.× Khlopenkov, K.× Kobuchi, T.× Komori, A.× Kostrioukov, A.× Kubo, S.× Kumazawa, R.× Liang, Y.× Masuzaki, S.× Matsuoka, K.× Minami, T.× Morisaki, T.× Motojima, O.× Muto, S.× Mutoh, T.× Nagayama, Y.× Nakamura, Y.× Nakanishi, H.× Narushima, Y.× Nishimura, K.× Nishizawa, A.× Noda, N.× Notake, T.× Nozato, H.× Ohdachi, S.× Ohkubo, K.× Ohyabu, N.× Oka, Y.× Ozaki, T.× Peterson, B. J.× Sagara, A.× Saida, T.× Saito, K.× Sakakibara, S.× Sakamoto, R.× Sasao, M.× Sato, K.× Sato, M.× Satow, T.× Seki, T.× Shimozuma, T.× Shoji, M.× Sudo, S.× Suzuki, H.× Takeuchi, N.× Tamura, N.× Tanaka, K.× Toi, K.× Tokuzawa, T.× Torii, Y.× Uda, T.× Watanabe, K. Y.× Watari, T.× Xu, Y.× Yamada, H.× Yamada, I.× Yamamoto, S.× Yamamoto, T.× Yamazaki, K.× Yokoyama, M.× Yoshimura, Y.× Tsumori, K.× Yoshinuma, M. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Ion heating experiments have been carried out in LHD using ECH (82.5, 84.0, 168GHz, leq 1MW), ICRF (38.5MHz, leq 2.7MW) and NBI (H^circ beam: 160keV, leq 8MW). The central ion temperature has been obtained from Doppler broadening of TiXXI (2.61 angstrom) and ArXVII (3.95 angstrom) x-ray lines measured with a newly installed crystal spectrometer. In ECH discharges on-axis heating was recently done with the appearance of high T_e(0) of 6-10keV and high ion temperature of 2.2keV was observed at n_e=0.6x10^13 cm^-3. A clear increment of T_i was also observed with enhancement of the electron-ion energy flow when the ECH pulse was added to the NBI discharge. These results demonstrate the feasibility toward ECH ignition. The clear T_i increment was also observed in ICRF discharges at low density ranges of 0.4- 0.6 x 10^13 cm^-3 with appearance of a new operational range of T_i(0)=2.8keV>T_e(0)=1.9keV. In the low power ICRF heating (1MW), the fraction of bulk ion heating is estimated to be 60% to the total ICRF input power, which means P_i>P_e. Higher T_i(0) up to 3.5keV was obtained for a combined heating of NBI (<4MW) and ICRF (1MW) at density ranges of 0.5-1.5x10^13 cm^-3. The highest T_i(0) of 5keV was recorded in Ne NBI discharges at n_e <1x10^13 cm^-3 with the achievement of T_i(0)>T_e(0), whereas the T_i(0) remained at relatively low values of 2keV in H_2 or He NBI discharges. The main reasons for the high T_i acievement in the Ne descharge are; 1) 30% increment of deposition power, 2) increase in P_i / n_i (11 times, P_i / n_i >> P_e/n_e, P_i<P_e) and 3) increase in 促tau_ei (3 times). The obtained T_i (0) data can be plotted by a smooth function of P_i / n_i. | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2002-10-01 |
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報告書番号 | ||||||
NIFS-753 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |